Furnace



(No Model.)

W. G. HIGGINS.

FURNAGE. No. 358,037. y Patented Feb. 22,1, 1887'.

3` y l 3o 11 s 8 lb .9 l2 7 WZTNESEE'.' ./'NVINTE UNITED STATES PATENTOFFICE.

TERTER C. HIGGINS, OF NORWICI-I, CONNECTICUT.

FU RNACE.

SPECIFICATION forming part of Letters Patent No. 358,037, dated February22, 1887.

Application filed July 20, 18SG. Serial No, 209.379. (No model.)

To all whom it may concern.-

Beit known that I, VEETER C. HIGGINs, of Norwich, inthe county of NewLondon and State of Connecticut, have invented certain new and usefulImprovements in Hot-Air Furnaces, of which the following is a full,clear, and eXact description, reference being had to the accompanyingdrawing, forming a part of this specification.

My invention relates to the class of furnaces ordinarily used forheating buildings, and in which the cold air is passed over suitableheat-radiating surfaces to increase the temperature of the air forheating purposes.

The object of my invention is to provide a hot-air furnace withextensive radiating surfaces, and also to render said furnace efficientand economic.A

To the above purposes my invention consists in certain new and usefularrangement and construction of parts, hereinafter fully described andclaimed.

In the accompanying drawing the illustration represents a sectional Viewof the furnace entire, taken on a vertical plane passing from front torear th rough the center of the furnace.

Referring to the drawing, the part designated 1 is the base-plate, andis invertedsaucer-shaped, with suitable legs fixed upon its lower edge,and with a groove, 2, upon its upper edge for the reception of thesuperposed casing 3, and may be suitably perforated upon the bottom toallow the admission of cold air into the interior of the casing 3. 'Iliecasing 3 is cylindrical-shaped with a elosediop from which run thedistributing-mains 4.

The face-plate 5 is curved to conform with the cylindrical form ofcasing 3, into the front of which said plate is set and riveted.v Thefire-door 6 and ash-door 7 are both located in the face-plate. Theash-pit S is an annular shell, tapering upwardly, and has at the frontthe ash-port 9, which is a box-like apartment. The grate-bars 10 aredisposed across the upper part of the ash-pit 8, and have thethreecornered teeth 11 and pinions 12, and are suitably mounted to beturned on their longitudinal axes by means of a key fixed to their freeends 18, which project outside of the face-plate 5.

The fire-pot consists of two similar sections, 15 and 16, which aretapering annular shelllike pieces, and flare upwardly. Above thefire-pot is the fire-chamber 17, which is somewhat vase-shaped, beinglarge at the bottom, then contracting upwardly, and then daringoutwardly. To the lower front part of firechamber 17 is situated thefire-port 1S, which is of the shape shown.

The crown-piece 19 is a circular shell-like piece which flares upwardly,and has at its rear the small chute 20. The deflecting-plate 21 is aflat annular plate with the central opening, 22, and the front opening,23. Above and around the central opening, 22, is located the cylinder24, which is open at both ends.

Over the crown-piece 19 and the cylinder 24 is placed the Cap-piece 25,whose general shape is like an inverted saucer, and is provided at itsrear with the chute 26, which, in conjunction with chute 20, over whichit is snugly tted, forms the smokepipe to carry off the products ofcombustion.

The primary feature of my invention lies in the peculiar construction ofthe cap-piece 25, together with the dcflecting-plate 2l and theinterposed cylinder 24. This cap-piece is constructed with the hollowconical pockets or projections 28, whose walls are of the same thicknessas the body of the cap-piece, and they project outwardly into the spaceof the upper part of the casing 3. Ihavc shown the conical apartments aslocated upon the top of the crown-piece and slightly spaced from eachother; but of course their arrangement may be varied. By virtue of theirconstruction and arrangement these hollow structures each affords quitea perfect radiator, each one acting like a miniature stove in itsfunction, for the caloric current courses through their interiors whiletheir outer surfaces radiate the heat very rapidly and efficiently. Thecylinder 24 rests upon the deilecting-plate 21 about the opening 22, andits upper edge takes snugly up against the inner face of the cappiece 25and permits the direct heat from the fire to strike into the interiorsof the several conical apartments 28, which it embraces in its area. Thecaloric current from the lirechamber 17 is deiiected by means of theplate 2l, and is compelled to iind its way to the opening 23 in saidplate, through which, after heating very thoroughly the walls of theiirechamber, it passes, as per the arrows, around the annular chamberformed by the cap-piece 25, cylinder 24, crown-piece 19, and thedeiiecting-plate 21.

The advantages of my peculiarly-constructed cap-piece 25 are obvious.Besides the very efficient work it performs, the piece, with itspeculiar conical apartments, is easily cast in one piece, since thestructure is simple and is readily withdrawn from the mold in casting.Moreover, the entire structure is very durable. The part 30 is anordinary dust-flue, which connects the ash-port 9 with the fire-port 1S,which are closed by the doors 7 and G, respcctively.

The several parts of the furnace herein described may be constructedsuitably of castiron, steel, or sheet-iron or any of the wellknownmaterials adapted for the purposes here needed. The joints of the partswhich come in contact may be set with cement or the like to make themretain their positions and to make the joints gas-tight.

There maybe several modifications madein my invention without departingfrom the spirit of the invention as herein described and claimed. Forinstance, the shape ofthe conical apartments 2S may be changed topyramidal or dome-like shapes.

I do not claim, broadly, the conical projections or pockets on theradiating-surface of a hot-air furnace, for I am aware that suchconstruction is shown in United States Patent No. 153,537; but,

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In a hot-air furnace, the combination, with thecap-piece, of the subjacent crownpiece, the deiecting-plate formed withthe central and the front openings,and the cylinder interposed betweensaid cap-piece and crownpiece, and inclosing the central opening of Saiddeiiecting-plate, and having the top closed by said cap-piece,substantially as herein described.

2. The combi-nation, with the cap-piece provided with the rear chute andthe conical apartments, of the crown-piece lying beneath said cap-piece,having the rear chute and provided with the deiiectingv-plate which hasthe central and front openings, and the cylinder located between saidcap-piece and said deiiecting-plate, said chutes together forming the.

smoke-pipe, substantially as described.

3. The combination, with the concavo-conveX cap-piece 25, provided withthe conical apartments 2S, of the subjacent annular crownpiece 19, thedefle'cting-plate 21, formed with the central opening, 22, and the frontopening, 23, the cylinder 24, interposed between said defiecting-plate21 and the cap-piece 25 and encompassing the central opening, 22, andhaving the top thereof` closed by said cappiece7 substantially as hereindescribed.

4. The combination, with the cap-piece 25, formed with the conicalprojections 28 and provided with the rear chute, 26, of the crownpiece19, provided with a rear chute, 20, the detlecting-plate 21, formed withthe central opening, 22, and the front opening, 23,and supported bythecrown-piece,and the cylinder 24, placed above said dei'lecting-plate andabout the central opening, 22, thereof, and closed at the upper end bythe cap-piece 25, all substantially as herein described.

wnRTER o. HIGGINS.

Witnesses:

M. F. BLIGH, J. A. MILLER, Jr.

